Added :pty option to command

Supports the following values:

- false or nil: Do not use pty (default)
- true / any other object: Use pty

If the object passed implements on_stdout(channel, data) and/or on_stderr(channel, data), these will be called back once per line of output from the server. This allows the user to programmatically send interactive data to the server, for example passwords, other options.

lib/sshkit/backends/local.rb

@@ -63,14 +63,14 @@ def _execute(*args)
           Open3.popen3(cmd.to_command) do |stdin, stdout, stderr, wait_thr|
             stdout_thread = Thread.new do
               while line = stdout.gets do
-                cmd.on_stdout(line)
+                cmd.on_stdout(stdin, line)
                 output << cmd
               end
             end
 
             stderr_thread = Thread.new do
               while line = stderr.gets do
-                cmd.on_stderr(line)
+                cmd.on_stderr(stdin, line)
                 output << cmd
               end
             end

lib/sshkit/backends/netssh.rb

@@ -136,14 +136,14 @@ def _execute(*args)
           exit_status = nil
           with_ssh do |ssh|
             ssh.open_channel do |chan|
-              chan.request_pty if Netssh.config.pty
+              chan.request_pty if command.options[:pty]
               chan.exec cmd.to_command do |ch, success|
                 chan.on_data do |ch, data|
-                  cmd.on_stdout(data)
+                  cmd.on_stdout(ch, data)
                   output << cmd
                 end
                 chan.on_extended_data do |ch, type, data|
-                  cmd.on_stderr(data)
+                  cmd.on_stderr(ch, data)
                   output << cmd
                 end
                 chan.on_request("exit-status") do |ch, data|

lib/sshkit/command.rb

@@ -67,14 +67,16 @@ def started=(new_started)
       @started = new_started
     end
 
-    def on_stdout(data)
+    def on_stdout(channel, data)
       @stdout = data
       @full_stdout += data
+      options[:pty].on_stdout(channel, data) if options[:pty].respond_to?(:on_stdout)
     end
 
-    def on_stderr(data)
+    def on_stderr(channel, data)
       @stderr = data
       @full_stderr += data
+      options[:pty].on_stderr(channel, data) if options[:pty].respond_to?(:on_stderr)
     end
 
     def clear_std_out_and_std_err
@@ -222,6 +224,7 @@ def to_s
 
     def default_options
       {
+        pty:                    SSHKit::Backend::Netssh.config.pty,
         raise_on_non_zero_exit: true,
         run_in_background:      false
       }

test/unit/test_command.rb

@@ -165,13 +165,13 @@ def test_failure?
 
     def test_appending_stdout
       c = Command.new(:whoami)
-      c.on_stdout("test\n")
+      c.on_stdout(nil, "test\n")
       assert_equal "test\n", c.stdout
     end
 
     def test_appending_stderr
       c = Command.new(:whoami)
-      c.on_stderr("test\n")
+      c.on_stderr(nil, "test\n")
       assert_equal "test\n", c.stderr
     end